Chamfer, croze, and equalizing knife for stave-machines.



w. w. PUTNEY.

CHAMFER, CROZE, AND EQUALIZING KNIFE FOR STAVE MACHINES.

* APPLICATION FILED MAR41l915.

1, 170, 1 87. Patented Feb; 1, 1916.

ll/5145 m MAKE/Meg WILLIAM .W. PUTNEY, OF KENT CITY, MICHIGAN, ASSIGNOB OF ONE-FOURTH TO,

MICHAEL A. MUMA AND ONE-FOURTH TO EDWARD lVL HOLLAND, BOTH 0F GRAND RAPIDS, MICHIGAN.

CHAMFER, CROZE, AND EQUALIZING KNIFE FOR STAVE-MACI-IINES.

To all whom it may concern:

Be it known that I, WILLIAM W. PUTNEY, a citizen of the United States of America, residing at Kent City, in the county of Kent and State of Michigan, have invented certain new and useful Improvements'in Chamfer, Croze, and Equalizing Knives for Stave- Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to a chamfer, croze and equalizing knife for stave machines of the tvne for cutting staves for barrels, casks and like articles of manufacture wherein a stave bolt is acted upon by cutters in a stave cutting machine to sever the staves from the bolt and at the same time chamfer and croze said staves.

It is the obiect and Purpose of this invention to provide a knife of this character which maV e used in stave cutting machines of ord-inarv type. especiallv in those machines known as the Greenwood machines,

and which will so act uponlthe stave bolt that it will simultaneouslv cut'the cham fer and croze' and cutoff the extended end of the bolt bevond the desired length of stave in the same plane with the stave, whereby at anv time if desired the stave bolt mav be reversed in the machine and thereafter operated upon.

It is also purposed 1n this lnventlon to provide a novel tvpe or kind of shimming knife to be used in connection with the stave ch amferin and crozing knife for trimming ofi the ridge of material. on the stave formed as the rec'edin stave has had the croze and chamfer cut therein at the same time-b} reason of the relative locations of theknives al- 'wavs cutting all the staves at the ends thereof to the same thickness irrespective of the thickness of the sta es between the ends.

For an understanding of the construction by which these ends are attained reference rn'av be had to the accompanying drawings in which;

Figure 1 is a: perspective view of a stave cutting machine with mv improved "knife in use therein. Fig. 2' is an end view of said machine with parts b oken away to disclose the structure; and Fig. 3 is a perspective Specification of Letters Patent.

- show their'coiiperation.

therebetween the Like reference characters refer to like parts throughout the several views of the drawing.

The stave machine itself is comprised of spaced apart end supports 1 having located horizontal connecting members 2 and 3 and supporting a central knife section 4 having itscutting edge downwardly, extending for cutting the central portion of the stave; saidknife at either end having in coniunction therewith the chamfer and crozing knives 5 which form an essential feature of mv present invention. In

' the operation of cutting the stave a bolt rests 'at its ends on the curved wave 6 and lies against the movable table 7 pivotallv mounted atits'ends at 8 to the end members 1 of the machine. said table being operated in an upward direction bv force ap lied to the yoke 9 which extends downwardlv from said table as shown. The stave bolt in this man- Patented Feb. 1, 1916.

Application filed March 4, 1915. Serial No. 12,071. i 1

ner is brought against the knives 4 and 5, I

the cutting ed es of which are set forward a distance equal to'the thickness of a stave in front of wavs 6., r

Specificallv the knife 5 comprises a metal plate havin asharpened lower ed e 10 and provided withtwo grooves 11 and 12 between the side edges thereof the lower-edges 0f the metal forming the grooves also being sharpened while upon the rear edge of the plate at the angle formed bv the groove 12, a

rib 13' is integrallv cast. it also having a sharpened lower ed e.

The lower edges of the plate from which the knife 5 is formed excepting those ortions formin grooves 11 and 12 are in alinement. Groove ll'is of comparative narrow width and as the stave bolt is forced against the cutting edge theretance back of the groove 11 of each knife is a shimming knife 1% having a curved section 15 with an outwardly flared portion 15 and terminating in the cutting edge 16 which as a stave is cut from the stave bolt trims off the residue of material left when the croze and chamfer of the previous stave was formed. It will be observedthat this shimming. knife 1% is adjustable back and forth with relation to the knife 5 and that it may be adjusted to any desired position with relation thereto. It will also be apparent that the said residue. ofmaterial is cut away simultaneously with the cutting of the stave from the bolt, so. that every stave cut is of exactly the same thickness. as its end, and a series of said staves are capable of being made into abarrel of standardsize a result impossible of attainment heretofore owing to the fact that when the shimming knife acts after the stave cutting knife the vibration of the stave produces inequalities and when it cuts from the bolt before the action of the cutting knife there is a tendency for the bolt or knife to jump chatter making imperfect and irregular cuts as will be apparent. The edge of the knife comes immediately within the position occupied by the rib 13 so that it may be. adjusted closer to knife 5 than would be the case if any portion of knife lat was back of the rib 13. At times it is desired to cut the ends of the stave thin, at other times it may be desired that they shall be of greater thickness and this is effected in my machine by the adiustment of the knife 14 with respect to'the knife 5 as described, but in all cases all the staves cut from a bolt after the shimming knife is once adjusted are of the same thickness at the ends.

In the operation of this machine, a stave bolt may be placed therein and the table 7 operated back and forth to cut staves therefrom. The sections of the knives 5 beyond the wider grooves 12 will cut the ends of the bolt bevond the ribs 13 in the same plane and in alinement with those portions of the bolt normally acted upon by the knife 1 and by those sections of the knives '5' adjacent the. grooves 11'. In this way the surface of the stave that has been acted upon bythe knife presents a substantially plane appearance exeept where acted upon by the grooved portions of the knives and said stave may be reversed at any time if necessary or advisable on account of the grain or other characteristics of the stave bolt. This is a very essential feature of my invention and one of considerable practical value. The shimming knife used in conjunction with the chamfer and crozing knives is of novel formation and its curved end lying back of the stave as it is cut from the bolt is in best position to remove the residue of material left in making the croze on the previous makes it possible to cut the staves at their ends of any. desired thickness. It will also be evident that the flared out portion 15 serves as a guideuto. throw the material removed by the shimming knife outwardly to one side preventing. any of such material from coming back upon the bolt and interfering. in any way with; the operation of. the

cutting knives thereupon.

From the foregoing it will be evident that I have provided a simple and very efficient knife for simultaneously cutting, crozing and chamfering staves, the ends of the stave as indicated at 17 in Fig. 3 being completely formed withv the one operation.

My invention isdefined in the appended claims and all modifications in structure falling within: their scope are to be considered as comprehended within said invention.

1. In a stave cutting: machine, the combination with a table on which a stave bolt is. placed of a central knife for cutting the central portion of the stave and an auXiliary chamfering, cro'zing and eq'alizing knife in alinement with and at each end of the central knife to. cut, chamfer and croze a stave at'a' single operation, said auxiliary knives having extensionsbeyond the chamfer and crozing. portions thereof in alinement with the central knife for cutting the ends of the stave bolt beyond the length of the stave cut therefrom in the same plane with the central portion of the stave bolt.

2. A chamfering. crozing and equalizing knife for stave machines'comprising a plate having a sharpened edge a pair of adjoining grooves in said knife one of which is comparativelynarrow and the'other of comparatively' greater width, and a rib having a sharpened edge on the-back of said knife opposite the lowermost-point of the wider groove, the edge of the knife at either side of the: grooves being in alinement, substantially as described.

3; In combination, a 'chamfering, crozing and equalizing knife for use in stave machines, a shimming knife including a portion adapted to be secured to arstave machine and a forward curved extension terminating in. a downwardly extendingsharpened edge located directly back of the cutting edge of the 'chamfering. crozing and equalizing knife whereby the cutting edges of said knives engage a stave bolt at substantially the same time, and means on the shimming knife to direct th material severed thereby away from the knives.

4. In combination, in a stave cutting machine, a chamfering, crozing and equalizing knife having a rib on its rear side, a shimming knife adjustably mounted with one side adjacent said rib and having its cutting edge substantially directly back of the edge of the cutting knife whereby said cutting edges of the knives engage the work at substantially the same time, said shimming knife being adjustable-in a direction substantially normal to the edge of the chamfering, crozing and equalizing knife that the thickness of staves at the ends thereof, cut by said knives may be varied, substantially as described.

5. In combination, in a stave cutting machine, a knife having a crozing groove and a chamfering groove, a rib havinga sharpened lower edge on the knife back of the chamfering groove, a shimming knife mounted to move back and forth in a direction substantially normal to the edge of said knife, said shimming'knife adapted to pass on the innerside of the rib and having a curved forward end terminating in a cutting edge directly back of the cutting edge of said knife, and means on the shimming knife to direct the material cut thereby laterally away from the knives, substantially as described.

6. In combination, in a stave cutting machine, a knife having a crozing groove and an'adjacent chamfering groove, a rib having a sharpened lower edge on the knife back of the chamfering groove, a shimming knife positioned directly back of the cutting edge of said knife and having its outer edge in a plane within the inner face of the rib having a forward end curved upwardly and then downwardly terminating in a cutting edge directly back of the cutting edge of said knife, and an upward and outward fiare to the curved portion of the shimming knife to guide the material cut by the shimming knife away from the knives and the material operated on by said knives.

In testimony whereof I aflix my signature in presence of two witnesses.

H. H. YARRINGTON, FRANK E. LIvERANoE, Jr.

Copies of this patent may be obtained for five cents each, by addressing the "Commissioner 01 Patents Washington, D. G. 

